Hibiscus (roselle)

Hibiscus sabdariffa · Mallow family (Malvaceae)

Hi, I'm Hibiscus! I turn water into a ruby-red, sour drink.

Hibiscus (roselle)
Image: Earl Benton · CC BY-SA 4.0 · Wikimedia Commons

What does it help with?

  • Heart & blood vessels

    Hibiscus tea may lower blood pressure a little in grown-ups whose blood pressure is too high.

    🟡 Scientists think so

What do the colored dots mean?
  • 🟢 Scientists are sure Strong evidence (several good human trials)
  • 🟡 Scientists think so Some evidence (small human studies)
  • 🟠 Still being studied Early evidence (lab or animal studies only)
  • 🔵 Grandma's wisdom Traditional use (not scientifically confirmed)

How we grade evidence

Careful if…

For kids OK in normal food Pills, powders & oils: ask a grown-up first

A glass of hibiscus drink is fine for kids. It is often made very sweet, so ask for less sugar!

  • Blood-pressure problems or medicines

    👀 Be careful

    People taking blood-pressure medicine should ask their doctor before drinking lots of hibiscus tea.

Natural does not always mean safe. Always ask a grown-up before trying something new, and a doctor or pharmacist before taking any supplement. Try the safety check →

What is it?

This plant has pale flowers. When they fall, thick red cups are left. People pick the cups and dry them.

In hot water, the dry cups make a bright red drink. It tastes sour, a bit like cherries. People drink it hot or cold in many hot countries.

How people use it

In the kitchen

  • Hot or iced tea, often with mint or ginger.
  • Jams and syrups.

Traditional uses

🔵 Grandma's wisdom — not proven by science

  • A cooling drink in hot countries.

Home & garden

  • Used as a natural red colour for foods.

Fun facts

  1. The drink is called karkadé in Egypt and bissap in West Africa.

  2. Hibiscus is a cousin of okra and cotton.

  3. Add a little lemon juice to hibiscus tea and watch it turn brighter red!

Grow it yourself

  • Medium
  • Lots of sun
  • Regular water
  • Grows in a pot
  • About 4 to 6 months from seed
  1. Sow seeds in a pot when the weather is warm.
  2. Give lots of sun and water regularly.
  3. After the flowers, pick the fat red cups and dry them for tea.

Quiz time!

Answer 3 questions. Get 2 right to win this plant’s badge for your garden!

  1. What colour is hibiscus tea?

  2. Which part of the hibiscus is used for the drink?

  3. What is a healthy tip for hibiscus drinks?

Your plant card

Print it, cut it out and collect them all!

Hibiscus (roselle)

Hibiscus sabdariffa

Superpowers
Heart & blood vessels
Careful
Blood-pressure problems or medicines
Growing
⭐⭐

🤩 The drink is called karkadé in Egypt and bissap in West Africa.

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For grown-ups: science, amounts & safety

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General information, not medical advice. Talk to a doctor or pharmacist before using any herbal supplement — especially during pregnancy or breastfeeding, for children, before surgery, or if you take medicines. Medical disclaimer

What the research says

Use Evidence Details
Heart & blood vessels 🟡 Some evidence (small human studies) A 2022 meta-analysis of 17 trials found hibiscus lowered systolic blood pressure by about 7 mmHg versus placebo, most in people with raised blood pressure, and slightly lowered LDL cholesterol[1]. A stricter Cochrane review found only one eligible trial and judged the evidence insufficient[2].

Who should be careful & interactions

  • 👀 Be careful Blood-pressure problems or medicines: Because hibiscus may lower blood pressure[1], people on antihypertensive medicines should monitor their blood pressure.

Names & identifiers

Scientific name
Hibiscus sabdariffa
Also called
Roselle, Karkadé, Bissap, Sour tea
Wikidata
Q319390

Sources

  1. A systematic review and meta-analysis of the effects of Hibiscus sabdariffa on blood pressure and cardiometabolic markers Nutrition Reviews · 2022 · Research review · PubMed
  2. Roselle for hypertension in adults Cochrane Database of Systematic Reviews · 2021 · Research review · PubMed

✅ Reviewed by sm_owner on September 26, 2026.

Last updated September 25, 2026. How we write and check our pages

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